2003 Mercury sable stalls under slight load (going uphill) turn on air conditioning, car shakes and misses very bad and dies. What is a good course of action?

Asked by Kevin7101961 Mar 12, 2016 at 12:30 PM about the 2003 Mercury Sable LS Premium Sedan FWD

Question type: Maintenance & Repair

I have replace the pvc valve, repaired vacuum hoses to throttle body. Nothing
is obviously wrong by visual inspection. What would cause the drastic change
when air conditioner is turn on and making the condition worse? Makes me
think electrical.

1 Answer

Kevin7101961 answered 8 years ago

Thank you tennis shoes, more to my efforst: I had a code found po191, after reading and replacing the fuel sensor located front top left prior to the fuel rail it is better (has more power) still misses, less now than before, with the warmer weather I drove it and turned on the ac, this drastically increased the miss. Reading your above comments ( not getting ac or psps commands) believe there is something with that. Replacing the fuel regulator/sensor did make the engine light go out. Still in need of a solution.

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